1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f441d82b5ab2a320433e0b85561b23efc9cb1f9439407e1e58350a44f255870. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e54d3b5-5128-434a-82fb-04f071303a79.json and https://artists.proofprofile.net/proofs/artist/0e54d3b5-5128-434a-82fb-04f071303a79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa123eaea4bbaf4fcd5904c903cc37c2810755910ef5457028512d61c6da61d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91405292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954ecf66afd7711f37b22f346dcc6de216c2d5f629100beb5495192c955b7af6. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91405297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba79f22e23ddd14fba16243c27fd236c89cc942219d418773c45bf03a20accfd. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91405298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfe3991a9982b44ff1aedc94fa8107a0caeaa206cd404b1a7463806838230b0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1697399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ed81c5f527e06552cd277c55eccbdfc1f802b31ad9a0597cd899d42f47357. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1697410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f3f70ba7d9726292a8a84c6e2306f9612e6720467eefa1e644927f1129c522. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1697429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3cb2bd488bf29660b8a3be4a77ac59e70c7be8f2b07c0161dcd08ab4b660f8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1697432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe60a16529a11423c14bccf86d7c49ca34e8f0f9a7e87f43139ea0c6d1e4b465. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1697433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec2962b427754f5c3b245227aba52f5b89b544ba5eb09bc916689d00367ca87. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1985456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531cce81ef65bf6f95ac121a29447b4fa091ada7fcfc5c4507b73256ffa5d872. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1985460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3b2bf5a667449a644a7f74c86df479d32b69111870e4c3c11348913640bfed. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:06:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1985462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152749e29308813dca8772b65ed11245b769167891c4b15fd6be389dd33a0457. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1985463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368af4428337b95ce3d1b87fd18d6560adb0d1a755529b1b64d661b0fd8e7dd2. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1985464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba75e133570597d5cfc27483a23a225b64de09ec9846276d581c9b06cf556f56. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:07:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1985466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc70fcd51a4d901dc75a5a5bc0cbc28f561215aa6f63495eda30f1ccc854a0b1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2056108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e2f391e118c95f2bcf42c18a33a84a92e77aa840e2c06c6e148417934ae0e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2236928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99ec336f031b92f2ebe93bed5c50ea9f07fb736821a6b214e11a30af9ea63d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2236931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8d970c8efed99ac9b1372fe306017504822af33e8c6b736feb3bf68663f010. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2236934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7937a6e1e85eab384fce123f944cdbc2b8ba2a4ce66e04737670c73a388d6542. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2236943.